abstract：<!DOCTYPE html><html><head><meta charset="UTF-8"><title>javascript变量</title></head><body><script> var num = 1,
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>javascript变量</title>
</head>
<body>
<script>
var num = 1,num2 = 2;
num += num2;
document.write(num);
</script>
</body>
</html>
Correcting teacher：查无此人Correction time：2019-05-07 09:41:10
Teacher's summary：完成的不错。刚开始学习js，比较辛苦，因为js有逻辑了，继续加油。